Bad Boy Matt Barnes is not to be trifled with and that goes double when you’re talking about his estranged spouse, Basketball Wives alumni Gloria Govan.

The recently divorced Derek Fisher thought bachelorhood was about to be sweet and he also thought he had an in with Govan after Barnes was to begin the 2015-2015 with the Memphis Grizzlies after being traded from the Los Angeles Clippers. He thought wrong on both accounts.

The New York Knicks coach was in Gloria Govan’s backyard (a house that Barnes paid for) for a get-together when Barnes found out and put the pedal to the metal of his car, driving nearly 100 miles to confront him.

Sources said Fisher was at the LA home of Gloria Govan — Barnes’ estranged wife​,​ who stars on “Basketball Wives LA” — on Saturday. Fisher and Govan have been dating for “a few months,” a source said, after Fisher filed to divorce his wife of 10 years, Candace, in March.

But when Barnes learned that Fisher was at his former home with Gloria, he drove 95 miles to LA to “beat the s–t” out of Fisher, sources said.

“Derek was in Gloria’s back yard with about 10 people having a bonfire on ​​Saturday,” said a source. “Derek’s separated from his wife and there’s a relationship with [Gloria].”

The source added, “Barnes was in Santa Barbara [at Memphis Grizzlies training camp] and heard that Fisher was in his house. He went crazy. He got in his car and went to the house and went after Fisher.”
Another source said, “Someone told Matt that Fisher was at the house and he drove down there — he went over to confront Derek.”

​A source close to Fisher ​confirmed the fight but said, “Matt came after Derek but he only had a few scratches … Derek’s not going to press charges, he’s going to let it go.”
Fisher left the scene before cops arrived, and we hear that Govan’s planning to file a restraining order.

Another source said that the altercation was the reason Fisher missed Knicks practice on Monday — but others said that he had been traveling back to New York on Sunday and was delayed because of plane trouble. The Knicks tweeted on Monday that Fisher was “not at practice due to personal reasons — expected back tomorrow.” He was in LA visiting his kids. ​​